ET WEB_SPECIFIC_APPS Niagara Workbench Anti-CSRF Token Disclosure (CVE-2025-3943)

alert http $HOME_NET any -> any any (
    msg:"ET WEB_SPECIFIC_APPS Niagara Workbench Anti-CSRF Token Disclosure (CVE-2025-3943)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:12;
    content:"/csp-reports";
    http.cookie;
    content:"niagara_userid|3d|";
    http.request_body;
    content:"/refresh$3ftoken$3"; fast_pattern;
    reference:url,www.nozominetworks.com/blog/critical-vulnerabilities-found-in-tridium-niagara-framework;
    reference:cve,2025-3943;
    classtype:web-application-activity;
    sid:2063844; rev:1;
    metadata:attack_target Server, created_at 2025_07_31, cve CVE_2025_3943, deployment Perimeter, deployment Internal, confidence High, signature_severity Minor, updated_at 2025_07_31, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1082, mitre_technique_name System_Information_Discovery;
    target:dest_ip;
)